<template>
    <div>
        <!-- 面包屑导航区域 -->
        <el-breadcrumb separator-class="el-icon-arrow-right">
            <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
            <el-breadcrumb-item>角色管理</el-breadcrumb-item>
            <el-breadcrumb-item>角色列表</el-breadcrumb-item>
        </el-breadcrumb>
        <!-- 卡片视图 -->
        <el-card>
            <!-- 添加角色按钮区域 -->
            <el-row>
                <el-button type="primary" @click="dialogVisible = true">添加角色</el-button>
            </el-row>
            <!-- 角色列表区域 -->
            <el-table :data="rolelist" border stripe>
                <!-- 展开列 -->
                <el-table-column type="expand">
                    <template slot-scope="scope">
                        <el-row :class="['bdbottom', i1 === 0 ? 'bdtop' : '', 'vcenter']" v-for="(item1, i1) in scope.row.children" :key="item1.id">
                            <!-- 渲染一级权限 -->
                            <el-col :span="5">
                                <el-tag closable @close="removeTag(scope.row, item1.id)">{{item1.authName}}</el-tag>
                                <i class="el-icon-caret-right"></i>
                            </el-col>
                            <!-- 渲染二级三级权限 -->
                            <el-col :span="19">
                                <!-- 通过for循环 嵌套渲染二级权限 -->
                                <el-row :class="[i2 ===0 ? '' : 'bdtop', 'vcenter']" v-for="(item2, i2) in item1.children" :key='item2.id'>
                                    <el-col :span="6">
                                        <el-tag type='success' closable @close="removeTag(scope.row, item2.id)">{{item2.authName}}</el-tag>
                                    </el-col>
                                    <el-col :span='18'>
                                        <el-tag :key="item3.id" v-for="(item3) in item2.children" type="warning" closable @close="removeTag(scope.row, item3.id)">
                                            {{item3.authName}}
                                        </el-tag>
                                    </el-col>
                                </el-row>
                            </el-col>
                        </el-row>
                    </template>
                </el-table-column>
                <!-- 索引列 -->
                <el-table-column type="index"></el-table-column>
                <el-table-column label="角色名称" prop="roleName"></el-table-column>
                <el-table-column label="角色描述" prop="roleDesc"></el-table-column>
                <el-table-column label="操作" width="300px">
                    <template slot-scope="scope">
                        <el-button type="primary" icon="el-icon-edit" size="mini" @click="showEditRoles(scope.row.id)">编辑</el-button>
                        <el-button type="danger" icon="el-icon-delete" size="mini" @click="removeById(scope.row.id)">删除</el-button>
                        <el-button type="warning" icon="el-icon-setting" size="mini" @click="showSetRightsDialog(scope.row)">分配权限</el-button>
                    </template>
                </el-table-column>
            </el-table>
        </el-card>
        <!-- 分配角色对话框 -->
        <el-dialog
            title="提示"
            :visible.sync="showSetRightsdialogVisible"
            width="50%"
            @close='setRightsDialogClosed'>
            <!-- 树型控件 -->
            <el-tree :data="rightsList" :props="treeProps" show-checkbox 
            node-key="id" default-expand-all 
            :default-checked-keys="defaultKeys" ref="treeRef"></el-tree>
            <span slot="footer" class="dialog-footer">
                <el-button @click="showSetRightsdialogVisible = false">取 消</el-button>
                <el-button type="primary" @click="allotRights">确 定</el-button>
            </span>
        </el-dialog>
         <!-- 添加角色对话框 -->
        <el-dialog
        title="添加角色"
        :visible.sync="dialogVisible"
        width="50%" @close="addDialogClosed">
        <!-- 内容主题区域 -->
        <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="80px" >
            <el-form-item label="角色名称" prop="roleName">
                <el-input v-model="addForm.roleName" clearable></el-input>
            </el-form-item>
            <el-form-item label="角色描述" prop="roleDesc">
                <el-input v-model="addForm.roleDesc" clearable></el-input>
            </el-form-item>
        </el-form>
        <!-- 底部区域 -->
        <span slot="footer" class="dialog-footer">
            <el-button @click="dialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="addRoles">确 定</el-button>
        </span>
        </el-dialog>
        <!-- 修改角色信息 -->
        <el-dialog
        title="修改角色"
        :visible.sync="editdialogVisible"
        width="50%" @close="editDialogClosed">
        <!-- 内容主题区域 -->
        <el-form :model="editForm" :rules="editFormRules" ref="editFormRef" label-width="80px" >
            <el-form-item label="角色名称" prop="roleName">
                <el-input v-model="editForm.roleName" clearable></el-input>
            </el-form-item>
            <el-form-item label="角色描述" prop="roleDesc">
                <el-input v-model="editForm.roleDesc" clearable></el-input>
            </el-form-item>
        </el-form>
        <!-- 底部区域 -->
        <span slot="footer" class="dialog-footer">
            <el-button @click="editdialogVisible = false">取 消</el-button>
            <el-button type="primary" @click="editRoles">确 定</el-button>
        </span>
        </el-dialog>
    </div>  
</template>

<script>
export default {
    data() {
        return {
            // 所有角色列表数据
            rolelist: [],
            dialogVisible: false,
            addForm: {
                roleName: '',
                roleDesc: ''
            },
            addFormRules: {
                roleName: [
                     { required: true, message: '请输入角色名称', trigger: 'blur' },
                     { min: 2, max: 15, message: '长度在 2 到 9 个字符', trigger: 'blur' }
                ],
                roleDesc: [
                    { required: true, message: '请输入角色描述', trigger: 'blur' },
                     { min: 3, max: 20, message: '长度在 3 到 20 个字符', trigger: 'blur' }
                ]
            },
            editdialogVisible: false,
            editForm: {
                roleName: '',
                roleDesc: ''
            },
            editFormRules: {
                roleName: [
                     { required: true, message: '请输入角色名称', trigger: 'blur' },
                     { min: 2, max: 15, message: '长度在 2 到 9 个字符', trigger: 'blur' }
                ],
                roleDesc: [
                    { required: true, message: '请输入角色描述', trigger: 'blur' },
                     { min: 3, max: 20, message: '长度在 3 到 20 个字符', trigger: 'blur' }
                ]
            },
            showSetRightsdialogVisible: false,
            rightsList: [],
            treeProps: {
                children: 'children',
                label: 'authName'
            },
            defaultKeys: [],
            roleId: ''
        }
    },
    created() {
        this.getRolesList()
    },
    methods: {
        async getRolesList() {
            const { data: res } = await this.$http.get('roles')
            if(res.meta.status !== 200) {
                return this.$message.error('获取角色失败')
            }
            this.rolelist = res.data
        },
        addDialogClosed() {
            this.$refs.addFormRef.resetFields()
        },
        addRoles() {
            this.$refs.addFormRef.validate(async vaild => {
                if(!vaild) return
                const { data: res } = await this.$http.post('roles', this.addForm)
                // console.log(res)
                if(res.meta.status !== 201) {
                    return this.$message.error('创建角色失败！')
                }
                this.dialogVisible = false
                this.getRolesList()
                this.$message.success('创建成功')
            })
        },
        editDialogClosed() {
            this.$refs.editFormRef.resetFields()
        },
        async showEditRoles(id) {
            this.editdialogVisible = true
            const { data: res } = await this.$http.get('roles/' + id)
            // console.log(id)
            // console.log(res)
            if(res.meta.status !== 200) {
                return this.$message.error('获取失败')
            }
            this.editForm = res.data
        },
        editRoles() {
            this.$refs.editFormRef.validate(async vaild => {
                if(!vaild) return
                const { data: res } = await this.$http.put(`roles/${this.editForm.roleId}`, { roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc })
                if(res.meta.status !== 200) {
                    this.$message.error('编辑失败！')
                }
                this.getRolesList()
                this.$message.success('编辑成功')
                this.editdialogVisible = false
            })
        },
        async removeById(id) {
            const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning',
                center: true
            }).catch(err => err)
            // console.log(confirmResult)
            if(confirmResult !== 'confirm') {
                return this.$message.info('已经取消了删除')
            }
            const { data: res } = await this.$http.delete('roles/' + id)
            if(res.meta.status !== 200) {
                this.$message.error('删除失败')
            }
            this.getRolesList()
            this.$message.success('删除成功')
        },
        async removeTag(role, rightId) {
            const confirmResult = await this.$confirm('此操作将永久删除该文件, 是否继续?', '提示', {
                confirmButtonText: '确定',
                cancelButtonText: '取消',
                type: 'warning',
                center: true
            }).catch(err => err)
            if(confirmResult !== 'confirm') {
                return this.$message.info('已经取消了删除')
            }
            const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
            if(res.meta.status !== 200) {
                return this.$message.error('删除权限失败')
            }
            role.children = res.data
        },
        async showSetRightsDialog(role) {
            this.roleId = role.id
            const { data: res } = await this.$http.get('rights/tree')
            if(res.meta.status !== 200) {
                return this.$message.error('获取权限列表失败')
            }
            this.rightsList = res.data
            console.log(res) 
            // 递归获取三级节点
            this.getLeafKeys(role, this.defaultKeys)  
            this.showSetRightsdialogVisible = true
        },
        // 通过递归的形式，获取角色下的所有的三级权限的id 并保存到defKeys 数组中
        getLeafKeys(node, arr) {
            // 如果当前接节点不包含 childtren 则是第三节点
            if(!node.children) {
                return arr.push(node.id)
            }
            node.children.forEach(item => {
                this.getLeafKeys(item, arr)
            })
        },
        setRightsDialogClosed() {
            this.defaultKeys = []
        },
        async allotRights() {
            const keys = [
                ...this.$refs.treeRef.getCheckedKeys(),
                ...this.$refs.treeRef.getHalfCheckedKeys()
            ]
            const idStr = keys.join(',')
            const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
            if(res.meta.status !== 200) {
                return this.$message.error('分配权限失败！')
            }
            this.$message.success('分配权限成功！')
            this.getRolesList()
            this.showSetRightsdialogVisible = false
        }
    }
}
</script>

<style lang="less" scoped>
.el-tag {
    margin: 7px;
}
.bdtop {
    border-top: 1px solid #eee;
}
.bdbottom {
    border-bottom: 1px solid #eee;
}
.vcenter {
    display: flex;
    align-items: center;
}
</style>